Strength Analysis And Optimization Design Of High Speed Bogie Welded Frame

With the development of scientific and technological level in our country, especially the high-end manufacturing represented by high-speed rail has been walking in the forefront of the world, our country independent research and development of new technology and new equipment put into use in succession. One of the most in our Chinese pride is large with the world’s advanced level of high-speed emu began to run in our country and the world wide.The bogie parts are an important link in relationship to the driving safety, the bogie must have enough strength to bear the brunt of load from the car body and passengers to ensure the safety of the emu operation. As the speed of ascension, as far as possible make the decrease of the quality of the bogie to improve the running stability and improve the comfort of the train has an important role.In this postgraduate thesis, the CRH3 type EMU is the research object, Using three dimensional CAD software to build the geometric model, And then import the finite element pre-processing software.Model cleanup and mesh generation. Calculated in the ANSYS software has obtained under 15 kind of operating mode load static intensity result which UIC-615 "Passenger train Vehicles Powered vehicle Bogie Framed structure Structural testing" stipulated,the analysis results show that the structure static strength to meet the requirements of the UIC- 615 standard.Select six fatigue risk points as fatigue assessment using Smith- Goodman curve for structure fatigue strength analysis, it is concluded that all dangerous point stress amplitude within Goodman curve, Proved the skeleton the fatigue strength conforms to the standard requirement. Based on the sub-model technology, uses ANSYS Workbench to carry on the intensity analysis for Frame side Liang, and has carried on the contrast with the ANSYS classical pattern, The proof sub model method has the advantages of saving time and simple operation in the finite element analysis of complex structure.Combining the theory of structural optimization and optimization software OptiStruct software with frame side beams size optimization, there are 4 steps iterative make the overall quality of the fabric decreased by 8.69%, achieved the purpose of lightweight.